Change-speed gear



C. DOMINICUS.

' CHANGE SPEED GEAR.

APPLICATION FILED FEB. 4, I920- 1,353,461, PatentedSept 21,1920..

3 SHEETS-SHEET l- C. DOMINICUS.

CHANGE SPEED GEAR.

APPLICATION FILED FEB; 4, 1920.

PatentedSept. 21, 1920.. 3 SHEETS-SHEET 2- C. DOMINICUS.

CHANGE SPEED GEAR.

APPLIQATIONJILED FEB. 4, 1920.

1,353,461 PatentedSept- 21, 1920.

3 SHEETS SHEET 3- U D STATES CORNELIS DOMI'NICUS, OFBAARN, NETHERLANDS, ASSIGNOR TO PIETER GERARD i TIDEMAN, OF APELDOOR N, NETHERLANDS. I i Y oHAnsE-srnnn GE R.

To all w/ wm it may concern: 7

Be it known that-I, CoRNnLIs DoMI IoUs,

Junior, a subject of the Kingdom of the Netherlands, residing at Baarn, Netherlands, Tromplaan 6, have inventeda new and useful Improvement in or Relating to ChangeSpeed Gears, of which thefollow ing is a specification.

I, OoRNELIs DoMrNI'oUs, Junior, engineer, of Tromplaan 6, Baa'rn (Netherlands) do hereby declare thenature of this invention and in what manner the same is to be performed, to be particularly described and as certained in and by the following state ment:-- c, 7 7 a I Thls inventlon relates to improvements in a device for changing the speed of a shaft, which by means ofgear wheels, be-' ing constantly 'in engagement witheach other, is-actua'ted by a shaft, driven with a certain speed by motive power. i p 1' The op'er'atingdevice according to theinvention consists of a block,'loosely mounted perpendicularly to'the axis of the two parallel shafts and shiftably between and symmetrically with respect to both the clutches, an operating shaft for the clutches-said block being provided at the under and upperside with projections, which block is located between two arms, firmlyfixed'to the operating shaft and provided withipins,

which also can engage the grooves of the clutches in such a, manner, that when moving the block to causethat one of these pins to engage the groove of one clutch, 'so

that said clutch can be moved into clutching position,simultaneously the projection of the block situated at the same side as the engaging pinenters into the groove of the other clutch to lock the latter against movement. in i v On the accompanying drawing the invention is further illustratedr Figure 1 represents an "elevationfof the change speed gearaccording'to the inven tion 1 I Fig. 2 represents a section, accordinglto lineAB in Fig.1.

Fig.3 represents an elevation of a'modi-l fied execution form the change speed gear.

In the Figsfil and 2 in shafts 2 and 3 are arranged parallel with each other. The shaft 2 is supposed to be Specification of Letters Patent. Patten driven by motive power. shaft to be actuated by the latter is indicated at 3. On;

7 are firmly fixed to said shaft. Both the gear wheels 4 and 5 are respectively'firmly connected to or are integral with claws 8 and 9, which are adapted to rotate freely o with their gear Wheels around theshaft- 2.

claws has a square cross section onwhich a clutch 10 is shiftably arranged, to couple either one of the vadjacent gear wheels 4 or 5 firmly to the shaft-,2. The gear wheels 4 and 5 respectively are in constant engagement with gear wheels 11 and '12, which are firmly fixed to the shaft, 3, so that when moving the clutch 10 either to the left or to the right two different speeds of the shaft 3 may be obtained.

p r V ted Sept. 21, 1920., f Application filed February 4,1920. Serial No. 355,293.

shaft, while both the outmostwheels 6 and .The portion ofthe shaft 2 between these On the outer sides of the gear wheelsll and 12 on the shafti are gear wheels 13 respectively, 14 loosely mounted on said shaft. The gear-wheels 13 and 14 respectively are in constant engagementvwith the fixed gear wheels 6 and 7on the v shaft 2. By m'eansof the clutch 15 the gear wheels 13am 14 separately can be coupled firmly to the shaft 3 by moving said clutch tothe left or to the right, whereby one of the 'pro longed claws oftheclutch 15 passes through i i the adjacent fixedwheelll or 12 to en gage oneof the loose gear wheels 13 or 14. For

vthis purpose the fixed gear wheels are provided with two suitable openings through which the claws of the clutch may pass, and these'claws are formed in halves which engage in corresponding recesses of the wheel boss. In this way either oftwo dif:

ferent speeds of the shaft 3' may be ob- 'tained. f o

It is obvious that, to cause the speed gear to Work properly, "theioperating device'must satisfy the conditions that, when one of the,

gear wheels .4 or. 5 is to be coupled firmly to the shaft 2,the clutch 10 on that moment ispermitted to move along and to rotate to; a 'gether with the shaft 2, while at the same time the clutch 15 must be locked in its normal position" against shifting along the o shaft 3, but allowed to rotate with said shaft. On the other hand if one of the gear wheels 13 or 1 1 is to be coupled to the shaft 3, the clutch 15 on that moment should be movable lengthwise and allowed to freely rotate with the shaft 3, while at the same timethe clutch 1O should bedocked in its normalposition, against shifting along the shaft 2 being. however permitted to rotate with saidishaft. ;Moreover both the clutches 1O I Y a" manner, that it crosses the shafts perpendicularly. 'Each clutch is provided'with a circumferential groove19 and 20 (Fig. 1),

in which can engage the projections 17* and. 18 in such a way, that sufficient play is left between the groove and the projection to allow a free rotation of the clutches.

- The block 16 further is provided in longitudinal direction with a boring through which an operating shaft 21, is passed, which can freely rotate therein. 'The shaft '21 is supported in bearings arranged againstthe wall of'the casingl. The block 16 is kept in position on. the'shaftr'by two arms 24 and 25, which are at both sides of the block and extend from the shaft in opposite directions. The arms 24 and 25 arefurther provided with pins 26 and 27, which are also adapted, just as the projections 17Iand 18, to engage in the grooves'19 and 20 of the clutches 10 and 15. In the normalposition the pins 26" and 27 aresituated in a samevertical planeperpendicularly to the shaft 2 and 3, with the projections 17 and 18. A

handle isarranged on the operating shaft 21 by which said shaft can be turned and moved to and fro. V

The device acts as follows: 1 If the handle 28 is put in the middle position and the shaft 21 is shifted in the direction of the arrow (Fig. 2) the pin 26 of the arm 24 engages the groove-19 of the clutch 10, whereas the projection 18 of the block 16 sli s out of said groove at the other side.

owever during the longitudinal movement of the shaft 21 the projection 17 of the block has entered into the groove 20 of p the clutch 15 so that this clutch is locked 127 at the other groove 20.

against sideward movement, while the pin s de s free from the By moving now the handle 28 perpendicu- V larly to the plane of the drawing the clutch l0 can be moved and either ofthe gear 3 wheels Land 5 can be coupled tothe shaft 2.

Referring to Fig. 3, which represents a modified form of the change speed gear according to the invention and which improves considerably the use of the gear, 2 indicates the shaft driven by'motive power. On this shaft are successively mounted a fixed gearwheelG, a loose wheel l with its claw 8 and 7 a clutch 10 just as with the form shown in Fig. 1. I

The gearwheel 5 with its claw 9.loosely .mounted on the shaft 2 and the gea'rwheel 7 fixed to said shaft with the form according to said Fig. l are respectively replaced by a fixed wheel 5 and aloose gear wheel 7. The boss 29 of this.latter-wheel,supported by a bearing 30 attached to or forming one whole with the wall of thev casing 1, is pro longed carrying at its outer. end a 'flange 31 to which the shaft 32, adapted to be actuated V at different speeds is connected by a flange 33. The shaft 2 bears'in the supported boss 30 of-the gearwheel 7. Moreover the clutch 10 at the right hand side isprovided with a long claw 3 1 to engage through. the fixed wheel 5 the gearwh-eel 7 'Theshaft 3, adapted in the arrangement Q 7 according to Fig. 1 to'be actuated at different speeds, with this form only serves as an.

intermediate shaft to impartdifferent speeds to theshaft 32. 5 On the intermediate shaft 3 are mounted from left to right, the loosev gearwheel 13,

the fixed wheel" 11, the clutch 15, the loose .7

wheel-12 and the fixed whee114.- Theclutch 15 is provided at the left side with a long claw to engage, through the fixed wheel 11,,

the, loose wheel13 to couple same to the shaft '3 and at the right side withan-ordinary shaped claw to engage the claw of" the loose wheel 12,when this latter'should be coupled to the intermediate shaft.

The operation, of the change speed gear is exactly the same as explained with the gear illustrated in Fig. 1. V

"Moving the clutch 10 to the right-the long claw engages through the fixed wheel 15' the 'gearwheel 7, whereby a direct coupling of the driving shaft 2 and the shaft 32 to be actuated is-effected.

Y It'is clear from the drawing that besides the direct coupling attained by moving. the

clutch 10 to the right the following-trans missions may be'obtained. By moving the clutch 10 to the left the speed of the driving shaft is transmitted by the wheels 4,11, 2 and 7 tothe shaft 32.

By moving the. clutch v15 tofthe left. said speed-is transmitted by 6, 13, 2' and 7 and moving said clutch to the right the transmissiontakes place by 5, 12, 2 andT.

' For reversing the movement .of the shaft- 3 a usual reversing-gear is arranged.

.Having now particularly described and ascertained the nature of my said invention and in what manner thesame is to be performed 'Iv declare that what I claim is:

'1. In achange speed gear, a driving other shaft; a clutch on each shaft, revoluble therewith and shiftable thereon into engagement with either of the loose gears, and common operating means for the clutches, arranged to move either of them into clutching position and to disengage the other and lock the same against clutching movement.

2. In a change speed gear, a driving shaft, a driven shaft parallel therewith, two pairs of gears on each shaft, one gear of each pair of gears being fast and the other being'loose, and each fixed gear of one shaft being engaged with a loose gear of the other shaft;

a clutch on each shaft, revoluble therewith and shiftable thereon into engagement with either of the loose gears, and common operating means for the clutches, arranged to move either of them into clutching position and to disengage the other and lock the same against clutching movement, one a of said clutches having prolonged end clawsextending through openings in the fixed gears and arranged for engagement with the loose gears of the shaft on which said clutch is mounted.

3. In a change speed gear, a driving shaft,

a driven shaft parallel therewith, two pairs of gears on each shaft, one gear of each pair of gears being fast and the other being loose, r and eachfix ed gear of one shaft being Yen-- gaged with a loose gear of the other shaft; a clutch on each shaft, revoluble therewith and shiftable thereon into engagement with either of the loosegears, each of said clutches having a circumferential groove, and common operating means for the clutches, arvranged to move either of them 1nt0 clutching position and to disengage theother and lock the same against clutching movement, said common operating means comprising a, shaft mounted for atrial and oscillatory movement, a block on said shaft having projections on opposite sides, each to enter the groove of one of said clutches, and oppositely extending radial arms at the ends of said block and each having a'pin to enter the groove of one of the clutches, when said groove has been disengaged by the corresponding projection. 

